Casing for a fan or heater



FIG. 1 is a front perspective view of a casing for a fan or heater, showing my new design;

FIG. 2 is a front elevation view thereof, the rear being a mirror image of that shown;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front perspective view of a casing for a fan or heater, showing a second embodiment of my new design;

FIG. 6 is a front elevation view of FIG. 5, the rear being a mirror image of that shown;

FIG. 7 is a top plan view of FIG. 5;

FIG. 8 is a bottom plan view of FIG. 5;

FIG. 9 is a front perspective view of a casing for a fan or heater, showing a third embodiment of my new design;

FIG. 10 is a front elevation view of FIG. 9, the rear being a mirror image of that shown;

FIG. 11 is a top plan view of FIG. 9; and

FIG. 12 is a bottom plan view of FIG. 9. 

The ornamental design for a casing for a fan or heater, as shown and described. 